Die cushion



F. J. RODE DIE cusmou Oct. 4, 1927.

Filed J 10, 1926 4 Sheets-Sheet 1 1 Oct. 4, 1927. t ROBE 644,086

DIE CUSHION v Filed June 10, 1 926 4 Sheets-Sheet 2 Jifiode 1,644, Oct.4, 1927. F. ROBE 086 DIE CUSHION Filed Jane 10. 1926 4 Sheets-Sheet 3 F.J. RODE DIE CUSHION Oct. 4, 1927.

Filed June 10, 1926 4 Sheets-Sheet 4 Patented Oct. 4, 1927.

UNITED STATES 1,644,086 PATENT OFFICE.

FRIEDRICH RODE, CHICAGO, ILLINOIS, ASSIGNOB T MARQUE'ITE TOOL do MANU- FACTURING 00., O1 CHICAGO, ILLINOIS, A CORPORATION 01 ILLINOIS.

DIE CUSHION.

Application filed June 10, 1926. Serial m. 114,908.

This invention relates to improvements in be prevented from tippingunder the action 10 of the draw ring pins thereon, whether the pins areplaced to one side of the center or not, or whether a greater number ofpins is placed on one side of the pressure pad than on another sidethereof.

A further object is to provide improved means for extending or buildingup the top surface of the pressure pad to a required or desired distanceabove the bed of the press.

To the attainment of these ends and the accomplishment of other new anduseful objects as will appear, the invention conslsts in the features ofnovelty in substantially the construction, combination and arrangementof the several parts hereinafter more fully described and claimed andshown in the accompanying drawings illustrating this invention, and inwhich Figure 1 is a front elevation of a sheet metal drawing presshaving a die cushion applied thereto in accordance with the pr1nc1- plesof this invention.

Figure 2 is a horizontal sectlonal view taken on line 2-2, Figure 3. a v

Figure 3 is a vertical sectional view of the lower part of the pressshowing the parts in one position.

Fi re 4 is a view similar to Figure 3 showlng the parts in anotherposition.

Figure 5 is a horizontal sectional v1ew taken on line 5-5, Figure 3.

Figure 6 is a horizontal sectional view taken on line 66, Figure 3.

' Referring more particularly to the drawings the numeral 10 desi atesgenerally the bed plate of the press which may be sup orted in a mannercommon in machines 0 this character.

A crank shaft 11 is supported by the framework 12 of the machine whichis rotated in any suitable manner, and a reci rocating ram 13 isconnected with the era shaft by means of suitable links 14".

The links 14 are adjustable by means of adjusting devices 15 whereby theextent of movement of the ram 13 may be varied.

In the present form of the invention a double press is shown and as theconstruction and operatlon of both portions thereof is the same thespecific description of one of these portions or sections will applyequally as well to them both. 1 Connected with the ram 13 is a diemember 14.

The bed 10 of the press is provided with an opening 16 therethrou h andprojections 17 extend inwardly from t e wall of the bed plate and aredisposed preferablyv ad'acent the top portion of the bed plate but lowthe upper surface thereof. Any number of these pro ections 17 may beemployed but preferably four of them are used.

Fassing through each of the projections 17 1s a rod or hanger member 18,the upper extremity of each of which is threaded to receive a nut orcollar 19, the latter resting upon the projections 17 to form a supportior suspending the rods or hangers 18 thererom.

These rods 18 may be of 'any desired length and depend below the bedplate preferably into a pt 20, and adjustably supported by the lowerends of these rods or hangers preferably by means of nuts or collars 21,1s a supportlng plate 22 upon which a fluid pretsssure CllShlOllembodying a cylinder 23 res Within the cylinder is arranged areciprocable piston (not shown) towhich is connected a piston rod 24that extends through the top 0 the cushion and is connectedwith thepressure pad 25. The pad 25 is provided with an opening into which theextremity of the piston rod 24 telescopes and the pad and iston rod aresecured together preferably y means of a collar 26 which is seated in areduced port-ion 27 in the piston rod 24. A cap 28 encompasses thepiston rod and is connected with the pressure pad 25 .in any suitablemanner so that the pad 25 and iston rod 24 will reciprocate together. enpressure is admitted into the cylinder 23 through a pressure sup ly pipe29 leading. from a suitable source 0 fluid ressure supl (not shown) thepiston is e evated cans-' mg the pad 25 to be raised. When pressure isexerted upon the pad 25 to lower the piston the fluld pressure will flowout of the pipe 29.

The pad 25 is provided with extended sleeves or bearings 30 throughwhich the l whether the pins exert a uniform pressure on one or bothsides of the pad and regardless of the number of (pins arranged onoppositesides of the pa It is sometimes desirable to build up thematerial therebetween, and a further lowering of the die 14 will causethe material to be shaped over the die 37 as shown in Figure 4. Duringthis shapmg movement the draw ring 34 will be lowered causing the pins33 to force the extension stools or sections 31 and the pressure pad 25downwardly agalnst the fluid pressure in the cylinder 23.

When the ram 13 rises, carrying with it pressure pad so as to extendthe-same for a the die 14 the pressure in the cylinder .23

considerable distance above the bed plate 10 of the ress and especiallywhen it is desired to per orm on a long stroke or deep draw press anoperation requiring a shorter stroke of the die carried by the ram ofthe press.

In order to accomplish this result the ram 13 is adapted to be adjustedwith respect to the crank shaft 11 through the medium of the adjustingdevices 15 and in order to com ensate this adjustment the top surface oft e pressure pad-upon which the draw ring pins operate, is extended bymeans of extension stools or members 31, any number of which may beemployed according to the height to which it is desired to extend thesurface of the pad.

These stoolsare ada ted to be connected together against relativelateral displacement' in any suitable manner such as by means of lookingpins 32 adapted to be threaded into one face of one of the stools L andto enter a co-operating or receiving recess in the proximate face of thenext adjacent stool or member 31. o

In the present form of the invention three of these extension stools ormembers are provided andthe pins 33 which support the draw ring or blankholding member 34 engage and rest upon the upper surface of theuppermost stool or member 31.

A supporting member 35 is provided, which is preferably of an annularconstruction, any number of which may be provided, here shown as two,are superposed upon each other, the lowermost member resting upon thebed plate 10. These members 35 encompass the extension stools or members31 and serve as a support for a bolster plate 36, the latter beingsecured in position in any suitable manner.

The pins 33 pass loosely through the bolster plate 36 and engage theuppermost extension stool or section 31, and supported by the bolsterplate and secured thereto in any suitable manner is adie 37 with whichthe die 14 co-operates.

In operation the material to be formed is placed upon the top of the die37 and the draw ring 34 when the parts are in the position shown inFigure 3, fluid pressure being admitted into the cylinder 23 through thepipe 29.

will raise the pressure pad 25, the extension stools or members 31, andthe draw ring 34.

With this improved construction it will be manifest that there isprovided a means which will be of a rigid construction embodylng theguide rods 18 and a pressure pad having long or extended bearings guidedupon these rods in such a manner that the draw ring or die pins 33 maybe placed in any position upon the surface of the pressure pad or of theextension stools or sections, if the latter are employed, either in thecenter or oflI' to one side of the center, or a greater number of pinsmay exert their-pressure upon one side than those present upon the otherside ofthe pad or extension without the danger or serious effectof'tilting the pressure pad, but under all conditions the pressure padwill be maintained straight or in a proper position and will be guidedin its movements.

Obviously the lateral faces of the extension stools or members 31 willbe shaped to permit the proper reciprocation thereof.

Furthermore, with this improvement it will be manifest that provisionshave been made whereby the top surface of the pressure pad may beextended so that the pad will be disposed at any desired distance abovethe bed of the press.

While the preferred form of the invention has been herein shown anddescribed, it is to be understood that various changes may be made inthe details of construction and in the combination and arrangement ofthe several parts, within the scope of the claims, without departingfrom the spirit of this invention.

What is claimed as new is 1. In combination, a draw press embodyingalunger, a work holding element cooperating therewith, a cushion for thework holding element means for supporting the cushion from the press,and a pressure pad interposed between the cushion and the work holdingelement, there being extended guiding portions carried by the said padfor maintaining the pad against tilting movement.

2. In combination, a draw press embodying a plunger, a work holdingelement cooperating thereWith a cushion for the work holding element,means for supporting the cushion from'the press and embodying extendedhanger members, and a pressure pad interposed between the cushion andwork holding element, there being extended bearings connected with thesaid pad through which the said hanger members pass for maintaining thepad against a tilting movement.

3. In combination, a draw press embodying a plunger, a work holdingelement cooperating therewith, a cushion for the work holding element,hanger members for suspending the cushion from the press, a pressure paddisposed between the cushion and work holding element, there beingextended bearings carried by the pad and through which the said hangermembers pass, for guiding and maintaining the said pad against a tiltingmovement, said cushion including a piston, and means connecting thepiston to the said pad.

4. In combination, a draw press embodying a plunger, a work holdingelement cooperating therewith, a cushion for the work holding elementand spaced therebelow, means for suspending the cushion from the press,a pressure pad movable upon the last recited means and interposedbetween the cushion and work holding element, and a plurality ofextension members mounted upon the top surface of the said pad forbuilding up the top surface of the pad.

5. In combination a plunger, a work holding element co-operatingtherewith, a cushion for the work holding element and spaced therebelow,a pressure pad disposed between the said cushion and the work holdingelement, an extension member mounted upon the top surface of the saidpad for building up the said surface, and pin like members supportingthe said work holding element and contacting with the top surface of thesaid extension member.

6. In combination a plunger, a work holding element 'co-operatingtherewith, a cushion for the work holding element and spaced therebelow,a ressure'pad disposed between the work hol ding element and the saidcushion, an extension member removably supported by the top surface ofthe said pad for building up the saidsurface, and means whereby pressurea lied to the said work holding element wil e exerted upon the saidextension member.

7. In combination a plunger, a work holding element co-operatingtherewith, a cushion for the work holding element and spaced therebelow,a pressure pad disposed between the work holdlng element and the saidcushion, an extension member removably supported by the top surface ofthe said pad for building up the said surface, means whereby pressure aplied to the said work holding element Wll be exerted u on the saidextension member, and means orming extended bearing surfaces for the padto maintain the pad against a tilting move-- ment.

8. In combination a plunger, a work holding element co-operatingtherewith, a cushion for the said element and spaced therebelow, aplurality of extension members superposed upon the top surface of thepad for building up the said surface, interengaging means between therespective members and the said ad for positioning them with respect toeach other and for maintaining them in such position, and means wherebypressure created upon the work holding element will be exerted upon thesaid extension members and pad.

9. In combination, a draw press embodying a plunger, a work holdingelement 7 co-operating therewith, a pressure pad for the said elementand spaced therebelow, a

plurality of extension members superposed v upon the to surface of thepad for building up said sur ace, interengagingmeans between therespective members and the said ad for positioning them with respect toeac other and for maintaining them in such position, means wherebypressure created upon the work holding element will be exerted upon thesaid extension members and pad, and an independent element encompassingthe said extension members and supported by the press.

In testimony whereof I have signed my name to this specification on this28th day of May, A. 11-1926.

FREDRICH J. RODE.

